Using Dsc Features; Digital Selective Calling; Advanced Dsc Features - Uniden MHS245 Owner's Manual

Using DSC Features

Digital Selective Calling

Digital Selective Calling (DSC) is a standard that allows you to call
other stations using their unique identification code (the Maritime Mobile
Service Identity or MMSI number), just like you would call a phone
number. To call another station, just enter that station's MMSI number
and choose the voice channel you want to talk on. The radio uses
channel 70 to transmit your MMSI number to the other station along with
the voice channel you requested. If the other station accepts your call,
both radios automatically switch to the requested voice channel so you
can talk to the other station.
DSC provides a system for automated distress calls. At the touch
of a button, the radio can transmit your MMSI number, the nature of
your distress, and your current position based on data from your GPS
receiver. The radio repeats the distress call every few minutes until it
receives an acknowledgement.
The DSC standard dedicates a VHF channel—channel 70—to digital
transmissions only. Since digital transmissions require less bandwidth
voice transmissions, channel 70 avoids the problems of busy voice
channels

Advanced DSC Features

Your radio supports the following DSC features.
Feature
Individual Call
Group Call
All Ships Call
Position
Request
Position Send
UNIDEN MHS245
Menu Item
Individual
Group
All Ships
POS Request
Position Send
Function
Contact another vessel from your
directory.
Contact all vessels that share
your group MMSI code.
Broadcast to all vessels within
range (used for Safety or Urgency
messages).
Request the current location of
another vessel.
Transmit your current location to
another vessel.
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Handheld VHF Marine Transceiver